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W. 0. BABE. Valve Gear for Steam Hammers. No. 233,188. Pateyted Oct. 12,I880.

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UNITED STATES PATENT Farce.

WILLIAM 0. BABE, OF JERSEY CITY, NEW JERSEY.

VALVE-GEAR FOR STEAM-HAMMERS.

SPECIFICATION forming part of Letters Patent No. 233,188, dated October12, 1880.

Application filed September 14, 1880. (N 0 model.)

To all whom it may concern:

Be it known that I, WILLIAM C. BARR, of Jersey City, in the county ofHudson and State of New Jersey, have invented certain new and usefulImprovements in Valve-Gear for Steam- Hammers, of which the following isa specification.

My invention relates to that class of steamhammers in which is compriseda rock-shaft provided with an arm connected with the valve for workingthe same, and with a slotted arm or lever which engages with a pin orprojecjection upon a reciprocating part of the hammer; and its object isto adapt the piston of the hammer for working with a short stroke ineither the lower or upper part of the cylinder, so as to provide fordelivering blows rapidly upon either thin or thick work.

To this end the invention consists in the combination, with the valveand a reciprocating part of the hammer, such as the hammerhead orpiston-rod, of a rock-shaft for operatin g the valve, devices foroscillating said rockshaft from the said hammer-head or piston-rod, anda hinged bracket containing the bearing for said rock-shaft, whichenables the rockshaft to be moved upward and downward to raise or lowerthe valve in the valve-chest, so as to cause the supply of steam belowthe piston to be cutoff more quickly than the supply above the piston,or vice versa, whereby the desired result is attained.

The invention also consists in details of construction to be hereinafterdescribed.

In the accompanying drawings, Figure 1 represents a central verticalsection of a cylinder and valve-chest and a side view of the valve-gearof a steam-hammer embodying my invention. Fig. 2 represents a side view,at right angles to Fig. l, of the lower portion of the hammer, includingthe valve-gear. Fig. 3 represents a horizontal section upon the dottedline a: m, Fig. 1; and Figs. 4 and 5 represent, respectively, aplan andside view of the hinged bracket, the rock-shaft, and theirappurtenances, upon a larger scale.

Similar letters of reference designate corresponding parts in all thefigures.

A designates the cylinder, B the piston, and B the piston-rod, of thehammer, which is adapted to be secured to the side of a post or othersupport, the cylinder being provided with a bracket, A, for thatpurpose.

0 designates the valve, which is here represented as consisting of adouble pistonvalve, though any other valve adapted to the situationmight be used.

D designates the live-steam chest, which is supplied by an inlet, a, andD designates the exhaust-chest, provided with an exhaust-outlet, b.

From opposite ends of the cylinder extend passages c, which communicate,by means of ports d, with the live-steam chest D, and by means of otherports, 6, with the exhauststeam chest D.

It is obvious that if the valve be placed centrally and perform its fullmovement above and below the central position the steam will be admittedequally above and below the piston, and that if the valve be raised andstill perform its full movement, steam will be admitted in greaterquantity above the piston, and will be cut off from below the pistonearly in the upward stroke thereof, thus causing the piston toreciprocate in the lower portion of the cylinder. If, on the contrary,the valve be lowered, the steam will be admitted in greater quantitybelow the piston and be cut 05 from above the piston early in thedownward stroke thereof, thus causing the piston to reciprocate in theupper portion of the cylinder.

Turning, now, to other parts, E designates a rook-shaft provided with anarm, f, which engages With and reciprocates the valve-stem g, and havingfixed upon it an arm or lever, F, which is slotted for the greaterportion of its length and engages with a pin or projection, G, upon thehammer-head G.

By the reciprocation of the piston the arm or lever F is moved back andforth, the rockshaft is oscillated and the valve reciprocated. Commonlythe rock-shaft E is fitted in a stationary or rigid bearing; but Iprovide a bearing for it in a bracket, H, which is hinged or pivoted ath to a support, I, projecting from the cylinder A.

It is obvious that if the rock-shaft E be raised or lowered the valvewill perform its movement higher up or lower down in the chest, with theresults previously described.

To provide for conveniently moving the bracket H and raising andlowering the rockshaft, I employ an arm or lever, J, rigidly attached tothe bracket, and of suilicient length to be grasped in the hand andafl'orded leverage to operate conveniently.

To hold the rock-shaft in any position to which it may be adjusted, Iemploy a clamping'bolt, 1', passing through the arm or lever J andengaging with an arc-shaped guide, K, rigidly connected with thebracket-support I, and in the present instance provided with anarc-shaped slot, j, through which the bolt passes.

\Vhen the bracket II is shifted and secured in any position bytightening the clampingbolt 2' the hammer will operate automatically;but when the said clamping-bolt is loosened the hammer may be operatedintermittently by hand by shifting the arm or lever J.

By my invention I provide, in a very convenient manner, for causing thepiston of a steam-hammer to reciprocate quickly and with the full powerdue to the pressure of the steam in either the lower or upper part ofthe cylinder, and thus afford facility for operating either upon thin orthick work.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, in asteam-hammer, with a rcciprocatin g valve and areciprocating piston-rod and hammer-head, of a rock-shaft for operatingthe valve, devices for oscillating said rock-shaft from the saidpiston-rod or hammer-head, and a hinged bracket comprisin g a bearingfor said rock-shaft, substantially as and for the purpose specified.

2. The combination, in a steam-hammer, with a reciprocating valve and areciprocating piston-rod and hammer-head, of a rock-shaft for operatingsaid valve, devices for oscillating said rock-shaft from the saidpiston-rod or hammer-head, a hinged bracket comprising a bearing forsaid rock-shaft, a hand-lever for adjusting said bracket, and a devicefor clamping said bracket when so adjusted, substantially as and for thepurpose specified.

3. The combination of the valve (1, the rockshat't E, provided with thearmfand the slotted lever F, the projection and hammer-head G G, thehinged bracket H, the hand-lever J, and a device for clamping saidhand-lever in position, all substantially as specified.

WILLIAM C. BARR. Witnesses FREDK. HAYNES, Tnos. E. BIRCH.

